At least 11 people died in an accident at a coal mine in Russia's Siberia on Thursday, local authorities said, as emergency workers tried to rescue dozens more miners who were still trapped deep underground.
Coal dust caught fire in a ventilation shaft in the Listvyazhnaya mine in the snowbound Kemerovo region, filling the mine with smoke, the TASS news agency cited local emergency services as saying.
Eleven people were found dead, Regional Governor Sergei Tsivilev said, and 46 were still underground. Dozens of others were being treated in hospital, at least some of them with smoke poisoning. Four were in critical condition.